steam engine

noun 0.764

combustion engine

noun 0.754

engine

noun 0.720

internal combustion engine

noun 0.711

air engine

noun 0.683

reciprocating engine

noun 0.679

jet engine

noun 0.673

piston engine

noun 0.666

heat pump

noun 0.658

traction engine

noun 0.653

stationary engine

noun 0.650

ion engine

noun 0.645

heat exchanger

noun 0.645

rocket engine

noun 0.639

heater

noun 0.631

engine room

noun 0.623

steam turbine

noun 0.619

steam boiler

noun 0.614

two-stroke engine

noun 0.609

electric motor

noun 0.601

boiler

noun 0.600

power plant

noun 0.599

space heater

noun 0.590

thermal energy

noun 0.590

internal combustion

noun 0.589

furnace

noun 0.588

rotary engine

noun 0.588

database engine

noun 0.584

chemical engineer

noun 0.584

water heater

noun 0.583

turbine

noun 0.582

oil burner

noun 0.581

mechanical engineering

noun 0.577

space heating

noun 0.576

diesel generator

noun 0.576

radiator

noun 0.573

engine block

noun 0.573

heating

noun 0.572

search engine

noun 0.572

engine driver

noun 0.570

thermodynamics

noun 0.568

internal energy

noun 0.568

fire engine

noun 0.564

steam power

noun 0.562

heat sink

noun 0.560

power station

noun 0.559

turbomachine

noun 0.558

mechanical energy

noun 0.557

chemical engineering

noun 0.557

steam locomotive

noun 0.553

perpetual motion machine

noun 0.551

donkey engine

noun 0.551

air conditioner

noun 0.547

hot water heater

noun 0.547

heat capacity

noun 0.547

electric fire

noun 0.546

graphics engine

noun 0.546

engine trouble

noun 0.545

exergy

noun 0.545

engineman

noun 0.545

exhaust system

noun 0.545

animal heat

noun 0.545

thermostat

noun 0.544

combustor

noun 0.544

superheater

noun 0.543

pump

noun 0.543

feedwater heater

noun 0.542

enthalpy

noun 0.541

energy source

noun 0.540

intercooler

noun 0.540

powertrain

noun 0.538

bomb calorimeter

noun 0.537

steam carriage

noun 0.536

masonry heater

noun 0.535

engineer

noun 0.534

microengine

noun 0.533

engineering

noun 0.533

steam hammer

noun 0.532

mechanical

noun 0.531

turbocharger

noun 0.531

simple machine

noun 0.530

storage engine

noun 0.530

motor

noun 0.530

calorimeter

noun 0.529

locomotive

noun 0.529

chemical energy

noun 0.529

energy

noun 0.529

horsepower

noun 0.529

incinerator

noun 0.529

thermopower

noun 0.528

enzyme

noun 0.527

motive power

noun 0.527

water turbine

noun 0.527

heating oil

noun 0.525

nuclear reactor

noun 0.524

cogeneration

noun 0.523

oil stove

noun 0.522

fuel cell

noun 0.522

fossil fuel

noun 0.521

analytical engine

noun 0.519